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            <div class="panel-heading">用户注册</div>
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                <button class="btn btn-success">立即注册</button>
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        <div class="panel panel-primary">
            <div class="panel-heading">这是panel的head</div>
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                这是panel的body
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                这是panel的footer
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            <div class="panel-heading">这是panel的head</div>
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                这是panel的body
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                这是panel的footer
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            <div class="progress-bar progress-bar-danger progress-bar-striped active" style="width: 20%;">20%</div>
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            <li class="list-group-item">学习bootstrap <span class="text-danger pull-right"><i class="fa fa-trash"></i></span></li>
            <li class="list-group-item list-group-item-success">复习javaSE知识</li>
            <li class="list-group-item">复习jdbc知识</li>

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